关于java获取新浪天气示例

获取新浪天气数据可以通过以下步骤完成：

打开新浪天气API文档，查看API接口：

新浪天气API文档网址为：http://weather.sina.com.cn/

在文档中可以找到天气预报API接口，该接口地址为：http://php.weather.sina.com.cn/xml.php

接口地址后面可以添加需要查询的城市代码，例如：http://php.weather.sina.com.cn/xml.php?city=%B1%B1%BE%A9&password=DJOYnieT8234jlsK&day=0

其中city参数为需要查询的城市，需要进行URL编码；password参数为密码，固定值，无需更改；day参数为查询天数，可以查询一到七天的天气预报。
在Java中编写代码，通过HTTP请求获取天气数据

可以使用Java原生的URLConnection类或Apache的HttpClient类来发送HTTP请求。

使用URLConnection类的示例代码：

```java
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class WeatherAPI {
public static void main(String[] args) {
try {
String cityCode = "101010100"; // 北京城市代码
String urlStr = "http://php.weather.sina.com.cn/xml.php?city="
+ cityCode + "&password=DJOYnieT8234jlsK&day=0"; // API接口地址
URL url = new URL(urlStr);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET"); // 设置请求方法为GET
connection.setConnectTimeout(5000); // 设置连接超时时间为5秒
connection.setReadTimeout(5000); // 设置读取超时时间为5秒
```
        InputStream inputStream = connection.getInputStream();
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
        String line;
        StringBuilder stringBuilder = new StringBuilder();
        while((line = bufferedReader.readLine()) != null) {
            stringBuilder.append(line);
        }
        bufferedReader.close();
        inputStreamReader.close();
        inputStream.close();
        connection.disconnect();

        String weatherData = stringBuilder.toString(); // 获取到的天气数据
        System.out.println(weatherData);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
```
}
```

使用HttpClient类的示例代码：

```java
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

public class WeatherAPI {
public static void main(String[] args) {
try {
String cityCode = "101010100"; // 北京城市代码
String urlStr = "http://php.weather.sina.com.cn/xml.php?city="
+ cityCode + "&password=DJOYnieT8234jlsK&day=0"; // API接口地址
HttpClient httpClient = HttpClientBuilder.create().build();
HttpGet httpGet = new HttpGet(urlStr);
HttpResponse httpResponse = httpClient.execute(httpGet);
```
        InputStream inputStream = httpResponse.getEntity().getContent();
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
        String line;
        StringBuilder stringBuilder = new StringBuilder();
        while((line = bufferedReader.readLine()) != null) {
            stringBuilder.append(line);
        }
        bufferedReader.close();
        inputStreamReader.close();
        inputStream.close();

        String weatherData = stringBuilder.toString(); // 获取到的天气数据
        System.out.println(weatherData);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
```
}
```